Photo-engraving apparatus



(No Modl.) 4 Sheets-Sheet'Z. lW. A. BLOMGRBN. PHOTO BNGRAVING APPARATUS.

Patented July 22, 1890.

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W. A. BLOMGREN. PHQTO ENG-R'AVING APPARATUS. l

lNo 432,783. Eatented'July 22, 178.90.

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W. A. BLOMGREN. Y

PHOTO BNGRAVING APPARATUS. l No. 432,783. y Patented July/22,Y 1890.

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VILLIAM A. BLOMGREN, OF CHICAGO, ILLINOIS.

PHOTO-ENGRAVING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 432,783,dated J' uly 2v2, 1890.

Application filed March l, 1890.

To a/ZZ whom it may concern:

Be it known that I, WILLIAM A. BLOMGREN, a citizen of the United States, residing at Chicago, inthe county of Cool: and State of Illinois, have invented certain new and ,useful Improvements in PhotoEngraving Apparatus, which are fully set forth in the following speciiication, reference beinghad to the accompanying drawings, forming a part hereof, and in which- Figure l shows the front of the clock mechanism, dial, and hands and partially the means of making electrical connection, as shown, behind the broken-awayportion of the dial, and hands set ready for work. Fig. 2 is' an end view of the same device. Fig. 8 shows the dial of Fig. l on its reverse or interior side. Fig. 4 shows the clock mechanism of my device, as seen in front elevation, with the front or parts shown in Figs. l and 3 removed, so as to expose the clock mechanism, a part ot` which (and which performsno special function here) being indicated in broken lines only, the auxiliary or secondary clock mechanism being shown in operative contact with the main clock mechanism and ready for work. Fig. 5 shows Fig. l with its front replaced and cut by a horizontal plane above the shaft which carries the clock-hands, so as to show the mechanism below such plane. Fig. l6 shows Fig. 4 with all its parts replaced, as seen when cut by a vertical-plane passing' between the shaft of the escapement-wheel and the shaft carrying the hands, so as to show the mechanism between said plane and the weight in the clock, as seen from the windingmechanism side. Fig. '7 shows the lower end of the inner side of the side of the clock which has the winding and starting mechanism, so as to show the starting mechanism in side view. Fig. 8 shows in plan view the lever which brings the auxiliary or secondary clock mechanism in contact with the regular clock mechanism, and also shows its fulcrum. Fig. 9 shows in side elevation my clock, battery, bell, and photographer-s camera, all connected and set ready for action, the camera being partly broken away on the side, so as to show its interior mechanism.

Like letters refer to like parts.

The object of my invention is to produce a Serial No. 342,221. (No model.)

mechanism which, by means of a clock and an auxiliary Vclock mechanism connected thereI with, an electric circuit, and bell, I shall be enabled to time with accuracy the length ot' exposure required for zinc-etching prints, photographing, and, in short, wherever certain definite periods of time are required and whereby the undivided attention of an operator shall not be required, and thusf enable him to at the same time attend to one or more additional instruments or to other duties, and t0 attain said desirable end I construct my newand improved mechanism in substantially the following manner, namely:

I take any common clock-work a and connect with it an auxiliary or secondary clockwork A. As here shown, a part of the latteris carried on a lever c', which is fulcrumed at a2. The mechanism carried by said lever consists of a sector a3, carrying on its shaft an arm a4, to which is attached a connecting-rod a5, which connects with a geared sector a, journaled` to the frame of the clock-worko. At the outer end of the lever a is a spring a0, of which the upper end is connected to an adjusting-screw in the clock-case, by means of which the tension of said spring may be regulated. An intermediate wheel ax connects the clock-works a and A. Said wheel ax is placed at any suitable place in contact with any one ofthe train of wheels of the clock a, which will give the proper speed to the train of wheels of the clock mechanism A to give the the required motion to the hand al. A lever with pawl-and1'atchet mechanism, as shown in Figs. 2, 4, and 5, may be used to wind the clock a, or in lieu thereof any other suitable and well-known mechanism may be employed.

There isa springe on the shaft of the geared segment a6, which counteracts the motion of said segment and tends to prevent lost motion. a7 am, is wound a corde', attached to a weight run over a pulley, as shown, which tends to return the said hands to the starting-point and also tends to prevent lost motion. The

hands a7 d10 are set by means of an adj usting' screw e, which checks the motion of a lug e', forming a part of the sector a6.

On the short end of the lever a is attached a catch b, which is held bya hook b', forming On the shaft 0.9, which carries thehands ICO idrical 'projection at its outer end, which a part of the oscillating lever b2, fulcrumed or pivoted at b3. Said lever, with its hook, is drawn toward the lever a -by means of the spring h4. On the inner side of the dial is a spring h6, which carries a push button orstud b5, the inner end of which is in close proximity to a projection of the lever b2. The operation of the entire mechanism will be most easily understood by first describing the operation of the above-described parts, which will now be done.

The clock mechanisms a and A are now shownin operative contact. Such contact is made by the force of the spring a", which forces the parts a3 ax into frictional contact, preferably grooved or rubber-faced peripheral surfaces being given to said gearing, because therev is less lost motion. The said parts then move, respectively, as shown by the arrows. lVhen it is desired to stop the motion of the mechanism A, (the mechanism ct is to be in constant motion,) the outer end of the lever a is lifted up. This stretches the spring a", separates the parts a3 ax, and causes the hook b to snap under the catch b on lever b2. When it is desired to start the mechanism A, the stud b5 is pushed until it pushes back the lever b2, so as to disengage t-he hook and catch b Z), after which the spring a will raise the inner or long end of the lever and bring the two mechanisms into the position now shown. To the clock-case are attached binding-posts carrying insulated wires CZ and CZ from the two sides of a galvanic battery, respectively, one side d going to the shaft car-l rying the hands of the clock a, and the other wire d goingdown to the lower left-hand corner of the clock-case, where it rests on the surface of the edge of the side of the clockcase and there is brought in contact with another wire placed on the inner surface of the front of the clock, as shown in Fig. 3, which at their junction are uncovered, so as to make the current continuo us, as one wire, and on the inside of said front the said wire is changed into the form of a fiat brass spring d2, which is in frictional contact with the brass wheel d3, mounted on an insulating-hub h, which passes through the clock-face and over the shaft carrying the hands of the clock a. On said wheel d3 is a han d d4, to which is attached a spring d5, which is in contact with said hand and extends beyond it, and at its outer end carries a se1ni-cylindrical end da, and to the outer end of said insulating-hub is attached a hand d'7, which is parallel to the in* ner hand d, and firmly attached, so as to always point with it in the same direction. The hand a7 and the pinion on the shaft a9, actuated by the sector a6, are also firmly attached and move together, and on the outer end of the shaftV d is attached a hand d10, which is parallel and also moves with the interior hand a7 and indicates the time on the clock-dial. The hand a7 also has a semi-cylins'weeps in the same circle as does the part d6,

said parts facing each other and are arranged to come in contact when their said hands are parallel, and thus by the contact of said points complete the electric circuit for a short time, the said spring d5 yielding as the said cylindrical surfaces slip over each other, causing a bell B to ring.

The operation of the last-described mechanism is substantially as follows, namely: Suppose that it is desired to expose a plate in a camera iifteen minutes, the hand C37 is turned to indicate that time on the dial, and the hands a7 d10 being adjusted to the starting point, the outer hand striking against the stop d8, the push-button b5 is then pressed until the parts a A snap into contact as the clock goes on. The hand a7 will move on until it comes in contact with the part d6, when it will complete the electric circuit and cause the bell B to ring, thereby informing the 0perator that the required time has passed.

A photographens camera may also form an additional elementin the electric circuit and be used in connection with the clock and bell, as shown in Fig. 9, the electric circuit in this case closing the shutter of the camera and at the same time ringing the bell. The shutter f is hinged at f and has a spur f2, placed and projecting from the shutter about as shown, and above said parts is placed an electro-magnet g, the armature g of Which, playing between vertical guides, has a catch g2, which holds the spur f2, as shown, when the shutter f is open. Vhen the circuit is closed, the armature is attracted by the magnet, and thus raises the catch g2 above the spur f2, thus relieving the said parts from each other and allowing the shutter to fall. It should also be observed that the shaft a is not geared with the clock-work a, but that it is actuated by the auxiliary clock mechanism A only, as shown.

vVhen thought desirable, the clockdial may be made of glass and the iigures and divisions on it may be engraved in the glass, then only one hand for each set, instead of two, will give the same result, and only a button on the face of the dial, or any other means on any other part oi the mechanism, would be necessary to set the hand d'1, and thehand Z7 could then be seen at any of its positions both before and after it had made the electrical contact.

lVhat l claim ism l. In a time apparatus for photo-engrav ing, a continuously-actiug clock-movement actuating a secondary clock-movement, in combination with a dial provided with two independent sets of hands, each set of hands consisting of one or more members, whereof one of each of said set of hands is provided with means to make an electric circuit when said sets of hands pass over each other, substantially as specified.

2. In a time apparatus for photo-engraving, a continuously-acting clock-movement, in combination with a secondary clock-moven IOO IIO

1o be engaged and disengaged from said continuously-acting clock-movement, in combination with a dial provided with two independent sets of hands, and means whereby said hands may make an electric circuit, and

thereby operate electro-magnetic mechanism, 15

substantially as specified.

WM. A. BLOMGREN. Witnesses:

WM. ZIMMERMAN, T. E. VOGEL. 

